Problem with porn

Hello so I need some advice and let me start with please no Negative reply’s and not judging anyone who’s fine with porn …I’ve been with my SO for 5 years supposed to get married this October well recently had our second child together found out he’s been watching porn instead of coming to me and letting me pleasing him in some way …let me say when we first got together I made it very clear I’m not comfortable with him watching porn or looking at other women before we even got in this relationship I feel it’s very disrespectful not to just me but our relationship (I have trust issues due to my past & I already had/have self doubt and insecure and it just makes me feel like I’m not attractive enough or good enough because of the men I was with before my current SO due to them watching porn and it’s always caused problems in those relationships) well my SO promised me he would never do it he would come to me well after finding out he broke his promise i have been having a hard time trusting him I’ve tried talking to him about it but when I do I break down and to be honest it’s making me paranoid I just don’t know how to handle and move on from this anyone been where I’m at now or have any advice ?